package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import lombok.AllArgsConstructor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {

    @Autowired
    private SetmealDishService setmealDishService;
    @Autowired
    private SetmealService setmealService;

    /**
     * 新增套餐，同时需要保存套餐和菜品的关系
     * @param setmealDto
     */
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);

        //保存套餐和菜品的关联信息，操作setmeal_dish，执行insert操作
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes = setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());


        setmealDishService.saveBatch(setmealDishes);

    }

    /**
     * 删除套餐及其对应的套餐菜品关系
     * @param ids
     */
    @Transactional
    public void removeWithDish(List<String> ids) {
        //查询套餐状态，确定能否删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);
        int count = this.count(queryWrapper);

        //不能删除抛出业务异常
        if (count > 0){
            throw new CustomException("套餐正在售卖中，不能删除");
        }

        //可以删除，先删除套餐表中的数据
        this.removeByIds(ids);
        //删除关系表中的数据
        LambdaQueryWrapper<SetmealDish> queryWrapper1 = new LambdaQueryWrapper<>();
        queryWrapper1.in(SetmealDish::getSetmealId,ids);
        setmealDishService.remove(queryWrapper1);

    }

    /**
     * 修改套餐的售卖状态
     * @param status
     * @param ids
     */
    public void updateStatus(Integer status, List<String> ids) {
        List<Setmeal> list = new ArrayList<>();
        for (String id : ids) {
            Setmeal setmeal = setmealService.getById(id);
            setmeal.setStatus(status);
            list.add(setmeal);
        }
        setmealService.updateBatchById(list);
    }
}
